Mona Callenberg wrote awesome book about tin thread embroidery Tenntrådsbroderier in Swedish on 1997 (Finnish: Tinalankapunonta). Unfortunately it is difficult to find information about Mona Callenberg or her book in English.
This is a book about traditional Sámi tin thread embroidery. If you have never tried it out but got curious and are experienced with embroidery, I truly can encourage you to buy this book at second hand. The book has very good informative pics and I am sure with the help of dictionary or google translator the basic secrets can be solved out.
Yes, I've done tin thread embroidery several years ago but I have no any pics. They were orders. I did just the embroidery for reindeer leather hand bags. But for sure I should do some in the future for myself too...